Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Chevrolet Cobalt L4-2.4LFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
Engine Coolant Temperature Sensor Replacement
Removal Procedure
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. Drain the cooling system. Refer to Draining and Filling Cooling System (2.0L (LSJ)) Draining and Filling Cooling System (2.2L (L61), 2.4L (LE5)) Draining and Filling Cooling System (GE 47716 Fill).
2. If equipped with regular production option (RPO) MN5, disconnect the engine harness electrical connector (3) from the engine coolant temperature (ECT) sensor.
3. If equipped with RPO M86, disconnect the engine harness electrical connector (3) from the ECT sensor.
4. Carefully remove the ECT sensor.
Installation Procedure
Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. If you are reinstalling the original sensor, or if you are installing a NEW sensor without a sealer, coat the threads with sealant. Refer to Sealers, Adhesives, and Lubricants.
Notice: Refer to Fastener Notice.
2. Install the ECT sensor.
Tighten the sensor to 20 N.m (15 lb ft).
3. If equipped with RPO M86, connect the engine harness electrical connector (3) to the ECT sensor.
4. If equipped with RPO MN5, connect the engine harness electrical connector (3) to the ECT sensor.
5. Fill the cooling system. Refer to Draining and Filling Cooling System (2.0L (LSJ)) Draining and Filling Cooling System (2.2L (L61), 2.4L (LE5)) Draining and Filling Cooling System (GE 47716 Fill).
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.